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ethtool: provide link state with LINKSTATE_GET request

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Implement LINKSTATE_GET netlink request to get link state information.

At the moment, only link up flag as provided by ETHTOOL_GLINK ioctl command
is returned.

LINKSTATE_GET request can be used with NLM_F_DUMP (without device
identification) to request the information for all devices in current
network namespace providing the data.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek 2019-12-27 15:56:23 +01:00 • committed by David S. Miller
parent 1b1b1847c8
commit 3d2b847fb9
9 changed files with 146 additions and 6 deletions
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14
include/uapi/linux/ethtool_netlink.h
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@ -19,6 +19,7 @@ enum {
ETHTOOL_MSG_LINKINFO_SET,
ETHTOOL_MSG_LINKMODES_GET,
ETHTOOL_MSG_LINKMODES_SET,
ETHTOOL_MSG_LINKSTATE_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@ -33,6 +34,7 @@ enum {
ETHTOOL_MSG_LINKINFO_NTF,
ETHTOOL_MSG_LINKMODES_GET_REPLY,
ETHTOOL_MSG_LINKMODES_NTF,
ETHTOOL_MSG_LINKSTATE_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@ -181,6 +183,18 @@ enum {
ETHTOOL_A_LINKMODES_MAX = __ETHTOOL_A_LINKMODES_CNT - 1
};
/* LINKSTATE */
enum {
ETHTOOL_A_LINKSTATE_UNSPEC,
ETHTOOL_A_LINKSTATE_HEADER, /* nest - _A_HEADER_* */
ETHTOOL_A_LINKSTATE_LINK, /* u8 */
/* add new constants above here */
__ETHTOOL_A_LINKSTATE_CNT,
ETHTOOL_A_LINKSTATE_MAX = __ETHTOOL_A_LINKSTATE_CNT - 1
};
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1